Okay Guys,
I thought about raising the seat height and was going to attempt it. Then I thought- I just want to get the car done.
Here's what I have done to the seat and it is really strong. I tried to bend it and the only way it will bend is to break it.
The first thing I did was to weld every seam.

I then put the seat back together to make sure nothing warped.

I bought some Hot rolled steel 1" wide, 3/16" thick. You will need two 14" long for each seat. Put the steel in the vice and bend it slightly so it will lay flat on each end of the seat.

Position it so you can weld on both sides at the top but make sure the bottom sits next to the edge on the sides. Weld it doing spot welds. Make sure you don't hold the welder to long on the thin metal on the seat or you will melt through it. Weld longer on the steel to make sure you get a good weld.
A good idea is to paint under the steel and in the corners where the steel will cover.

Here is an area that you really want to weld just about the whole seam. This is the joint that is letting the seat twist.
